T. Horiike, M. Kondo, S. Kwon
1985
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Journal
Dyes and Pigments
Abstract
Abstract The synthesis of various compounds containing the 1,3-benzodithiole residue is reported. The compounds are examined for application as functional dyes for carbonless duplicating systems and are found to develop slowly on silica gel, and to have good fastness to light. Especially useful was 1,1-bis(p-dimethylaminophenyl)-2-(1',3'-benzodithiol-2'-yl)ethylene ( 5 ), which developed blue on silica gel; the developing rate and fastness properties of this derivative are compared with those of benzoyl leuco Methylene Blue.